Cy Waits didn't appear in court Monday while his lawyer, Richard Schonfeld, told a Las Vegas judge the 35-year-old former nightclub mogul will enter his plea Wednesday.
Schonfeld said he couldn't disclose terms of the agreement ahead of time. Prosecutor L.J. O'Neale wasn't immediately available for comment.
Waits faces a felony charge of being under the influence of marijuana, and misdemeanor charges of marijuana possession and driving under the influence stemming from the August 2010 arrest on the Strip.
Hilton pleaded guilty last September to misdemeanor cocaine possession and obstruction charges stemming from the stop. She's serving a year of probation.